One thing you really need to consider it that it is not just how long it takes you to do something, it is how good your work is. If it is taking you 2 hours to make your cuff and I can do a better job in 30 minutes, is yours or mine worth more?
And with all sensiivity, you need to pactice more. Think of it this way. If you went to the store, would you buy it, and how much would you pay?